How to perform list comprehension on the following two lists?

Question

This question has probably been asked here before but me being new to python and lack of better keywords to search led me to ask the question.

I have two lists:

list1 = ['John', 'Don', 'Sam']
list2 = ['Melissa', 'Amber', 'Liz']
couples = [x + ' and ' y for x in list1 y in list2] # I can't do that

My couples list should look like this:

['John and Melissa', 'Don and Amber', 'Sam and Liz']

How do I concatenate this two lists that way?

Thanks in advance

possible duplicate of [How can I iterate through two lists in parallel in Python?](http://stackoverflow.com/questions/1663807/how-can-i-iterate-through-two-lists-in-parallel-in-python) — Roger Fan, Aug 21 '14 at 19:59

score 4 · Accepted Answer · answered Aug 21 '14 at 19:56

4

>>> list1 = ['John', 'Don', 'Sam']
>>> list2 = ['Melissa', 'Amber', 'Liz']
>>> [' and '.join(i) for i in zip(list1, list2)]
['John and Melissa', 'Don and Amber', 'Sam and Liz']

answered Aug 21 '14 at 19:56

Cory Kramer

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score 1 · Answer 2 · edited Aug 21 '14 at 19:56

1

You can use zip() to iterate through both lists:

couples = [x + ' and ' + y for x, y in zip(list1, list2)]

edited Aug 21 '14 at 19:56

BrenBarn

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answered Aug 21 '14 at 19:55

jh314

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Padraic Cunningham · Answer 3 · 2014-08-21T20:01:46.803

zip both lists and use str.format

list1 = ['John', 'Don', 'Sam']
list2 = ['Melissa', 'Amber', 'Liz']
print ["{} and {}".format(*name) for name in zip(list1,list2)]
['John and Melissa', 'Don and Amber', 'Sam and Liz']

You can also use enumerate:

list1 = ['John', 'Don', 'Sam']
list2 = ['Melissa', 'Amber', 'Liz']
print ["{} and {}".format(name,list2[ind]) for ind, name in enumerate(list1)]
['John and Melissa', 'Don and Amber', 'Sam and Liz']

How to perform list comprehension on the following two lists?

3 Answers3